问题
In order to solve the problem as soon as possible, they had a __________ discussion.
A:face-to-face
B:face to face
C:faces-to-faces
D:faces to faces
B:face to face
C:faces-to-faces
D:faces to faces
正确答案是：
同类题型
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The child tiptoed quietly to the bird.＿＿＿into the forest when he was about to catch it.
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